Finding the Fourth Proportional to 443.46, 665.42 and 196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   443.46 : 665.42 = 196.72 : x
2. Step 2: Convert to fraction form
   443.46/665.42 = 196.72/x
3. Step 3: Cross multiply
   443.46x = 665.42 × 196.72
4. Step 4: Simplify right side
   443.46x = 130,903.30
5. Step 5: Solve for x
   x = 130,903.30/443.46
6. Step 6: Final answer
   x = 295.18